Read and write speed with CrystalDiskMark

by Kelvin
microsd portada

Read and write speed with CrystalDiskMark 28

A few weeks ago we published an article related to everything you should know about the infographics of the SD and microSD Cards. In that article we mention the importance of the speed of reading and writing a card, especially for high resolution videos (4K and 8K) and 360º videos, and we also indicated that you could measure it with CrystalDiskMark.

Well, now we will show you some tests to see if the speeds offered on some microSD memory cards are real.

  

The tool that we suggest to analyze card yields SD and microSD is the CrystalDiskMark . This software it is the one we currently use to measure the disk speeds of the reviews of notebooks that we have done in paperweight.

Before you begin, remember that:

1GiB = 1024MiB = 1024x1024KiB = 1024x1024x1024B

1GB = 1000MB = 1000x1000KB = 1000x1000x1000B

1MB / s = 1,000,000 byte / s

Steps to Install CrystalDiskMark

1. Go to the following link, which is the official site, its download is free.

Read and write speed with CrystalDiskMark 29CristalDiskMark download site

2. Then download until you reach the latest version of CristalDiskMark. (At the time of this guide, version 6.0.2 of 10-21-2018 is the most recent). Click on the "exe". The file weighs 2.9MB.

Read and write speed with CrystalDiskMark 30Latest version of CristalDiskMark

3. Once downloaded, a security alert will appear Windows, in which you must click on execute and follow the sequence of Instructions, until the program is installed (In the following image gallery you can see the sequence)

4. The following image shows the program once it starts.

Read and write speed with CrystalDiskMark 31CristalDiskMark in operation.

CrystalDiskMark interface

According to the following image:

Read and write speed with CrystalDiskMark 32Elements of the CriytalDiskMark Interface

The menu is very simple in which you consider:

  • Archive, by clicking you can copy or save the data of the tests executed.
  • In setting you can set:
    • Test data (default or all);
    • Define the time intervals of the duration of a single test. By default it comes in 5 seconds.
    • Queues & Threads (queue and spin depth), here you can configure the specific parameters that we want the CPU to run in the tests.
    • IE8 mode (IE9-); Change the form of the application to the one in Internet Explorer 8.
  • He topic allows you to change the colors for software defects.
  • Help, as the menu says, to access the help and see the version of the application.
  • Language: Here you can select the language you want

Tail depth is the number of requests for inputs and / or outputs (I / O) pending in a storage unit.

On the left side, there are 5 buttons. From top to bottom they represent the tests that are run with the application:

  • All, run the four tests indicated below Seq Q32T1, 4KiB Q8T8, 4KiB Q32T1 and 4KiB Q1T1
  • Seq Q32T1, is a test that is an acronym for Sequential (Block Size = 128KiB) Read / Write with multi Queues & Threads; that is, it is read / write in blocks of 128Kb sequentially with multiple threads and tails ..
  • 4KiB Q8T8
  • 4KiB Q32T1
  • 4KiB Q1T1

The last three tests are an acronym for Random 4KiB Read / Write with multi Queues & Threads, that is, they perform reading / writing of 4Kb blocks with multiple threads and tails.

To the right there are three drop-down boxes:

  1. The first indicates the number of tests to be run or the number of times the test will be repeated
  2. The second shows the test size Read and write while the test is running.
  3. The third the storage unit selected.

How does CrystalDiskMark work?

CrystalDiskMark is a very simple and very light software designed to analyze storage units, from HDD, SSD, External Disks, even Cards SD Y micro SD.

Keep in mind that the execution of this tool in solid disk drive (SSD), can affect its performance and the lifetime of the drive.

It is advisable to execute all operations, in the default state that the application is coming from. When you click on “All”, you must wait for the process to finish.

Once you're done you can capture the analysis, or save a text file with the information.

The CrystalDiskMark tests

As mentioned in the Interface section, the software will perform four different analyzes, in which the first one is sequential (one after the other), and the rest of the random type.

  • Seq Q32
  • 4KiB Q8T8
  • 4KiB Q32T1
  • 4KiB Q1T1

The first test (Seq Q32) measures the writing and reading of 128KB blocks of data sequentially. This is generally the speed that manufacturers report and the fastest it can reach the solid state drive, hard drive or microSD cards.

In the case of the other three tests, these are read and write blocks of 4KB data randomly. This speed is lower than the sequential one because it takes longer to change the solid state drive or hard drive from one place to another.. In this case we can see that hard drives significantly reduce their speed. This is due to the time it takes for the needle to change position (about 10 milliseconds). On the other hand, solid state units, although they also have a delay, this is much smaller because it has no moving parts, affecting its performance less.

Application examples and results

To get an idea of ​​the differences in the speeds of the different storage media. Here are comparative examples between a solid state drive (SSD) in M2 format, a mechanical hard disk (HDD) and three microSD cards.

  • To obtain information about the M2 SSD and the mechanical disk, we will use the sister application of CristalDiskMark, we are talking about CristalDIskInfo.
  • About the information on microSD cards, we will use the information described in your body.
  • For all tests, we will consider the default status of the application.

Test Hitachi HGST HTS721010A9E630 HDD mechanical disk drive 1000.2GB

The following image shows the information of the mechanical disk, CrystalDisckInfo was used for this:

Read and write speed with CrystalDiskMark 33Mechanical Disk Information

When you run the CrystalDIskMark the result of Benchmark It is as follows:

Read and write speed with CrystalDiskMark 34Capture Benchmark from the mechanical disk

The following image shows the test result in text:

Read and write speed with CrystalDiskMark 35Benchmark result of the mechanical disk.

Test solid drive SSD M2 NVMe ADATA SX7000NP 1024.2GB

The following image shows the information of the mechanical disk, CrystalDisckInfo was used for this:

Read and write speed with CrystalDiskMark 36 M2 Unit Information

When you run the CrystalDIskMark the result of Benchmark It is as follows:

Read and write speed with CrystalDiskMark 37Capture Benchmark from the M2 unit.

The following image shows the test result in text:

Read and write speed with CrystalDiskMark 38 Benchmark result of Unit M2.

Conclusion of tests on mechanical disk and solid drive

As indicated at the beginning of the tests, a lower sequential reading speed was expected (Seq Q32T1). In addition, the delay in moving the needle in a mechanical unit considerably delays reading and writing randomly.

Tests on microSD cards

Before starting the tests, let's remember some tables of the note All you need to know about SD and microSD cards:

Table No. 3 presents Speed ​​class and minimum sequential speed of reading and its uses for video.

Read and write speed with CrystalDiskMark 39Speed ​​Class Table and Minimum Sequential Speed.

Table Nº4 refers to the Application performance class: A1 and A2, designed to work as part of the internal storage memory in Android.

Read and write speed with CrystalDiskMark 40Application Performance Class Table.

Test Kingston 128GB U1 Class 10 HD Video microSD drive (80MB / s)

The following images provide the information of the micro SD analyzed.

According to the first table, a microSD card class 10 and type U1, can be considered with speed class V10 (fourth row from top to bottom). V10, ensures that the minimum sequential read speed of 10MB / s.

The speed reported on the cover corresponds to the maximum reading speed that the card could reach, in this case 80MB / s. This information is provided by the manufacturer, by way of reference.

When you run the CrystalDIskMark the result of Benchmark It is as follows:

Read and write speed with CrystalDiskMark 43

The following image shows the test result in text:

Read and write speed with CrystalDiskMark 44

The card complies with the information, widely exceeds the minimum sequential read speed (10MB / s) and also exceeds the maximum read speed reported: 88.422MB / s> 80MB / s

Test Kingston 128GB V30 U3 microSD unit, 4k Ultra HD (90MB / s)

The following images provide the information of the micro SD analyzed.

According to the first table, a microSD card type U3 and speed class V30, ensures that the minimum sequential read speed of 30MB / s.

The speed reported on the cover corresponds to the maximum reading speed that the card could reach, in this case 90MB / s. This information is provided by the manufacturer, by way of reference.

When you run the CrystalDIskMark the result of Benchmark It is as follows:

Read and write speed with CrystalDiskMark 47

The following image shows the test result in text:

Read and write speed with CrystalDiskMark 48

The card complies with what is indicated in your infographic, widely exceeds the minimum sequential read speed (30MB / s) and borders the maximum read speed reported (90MB / s) with 86,681MBs

Test Kingston 128GB V30 U3 A1 microSD unit, 4k Ultra HD (100MB / s)

The following images provide the information of the micro SD analyzed

According to the first table, a microSD card type U3 and speed class V30, ensures that the minimum sequential read speed of 30MB / s.

Further, It is of type A1, which according to the second table, allows a minimum random reading and writing of 1500 IOPS and 500 IOPS respectively. In addition, they must ensure that the minimum sequential speed is 10MB / s.

The speed reported on the cover corresponds to the maximum reading speed that the card could reach, in this case 100MB / s. This information is provided by the manufacturer, by way of reference.

When you run the CrystalDIskMark the result of Benchmark It is as follows:

Read and write speed with CrystalDiskMark 51

The following image shows the test result in text:

Read and write speed with CrystalDiskMark 52

The card complies with what is indicated in your infographic, widely exceeds the minimum sequential read speed (30MB / s), however it is below the maximum read speed reported (100MB / s) with 87.949MB / s.

On the other hand, with respect to Application Class A1, it meets the minimum sequential speed, by far (87.949MB / s >>> 10MB / s).

When looking at the report (see highlights), the card meets the minimum random write speed; in the last three tests exceeds 500 IOPS.

Read and write speed with CrystalDiskMark 53

Situation contrary to the minimum random reading speed, in no case, it exceeds 1500 IOPS.

Read and write speed with CrystalDiskMark 54

Particular case is the second microSD analyzed, it far exceeds the minimum random speed, but not that of writing. However, it is not specified as class A1.

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